How different is nitrous build than N/A?
#1
13 Second Truck Club
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How different is nitrous build than N/A?
Im planning out my next motor build and Im wondering, what is actually needed for a nitrous motor? Im looking at some engine packages and they seem too expensive for what they are.
If I was to build a nitrous motor (Vortec 4.3) What would be needed to change to make it handle some nitrous. Forged Pistons/Rods, performance bearing set, ARP studs and bolts throughout and properly set up rings for nitrous. Those are the things I can think of to change a normal rebuild into a fairly stout nitrous motor. Im not talking 400 shot or anything, prolly max 175.
.030 over 4.3
JE 4.030 Extreme duty pistons
5.7 Eagle H beam Rods(block needs clearancing for rods?)
266R Comp Cam
Stock oil pump/pickup
Stock DamperFlexplate/Timing Chain
ARP studs/bolts
Clevite Bearings
Ported stock Vortec heads w/3 angle valve job
Am I on the right track here? Do I have my thoughts of nitrous motor wrong?
If I was to build a nitrous motor (Vortec 4.3) What would be needed to change to make it handle some nitrous. Forged Pistons/Rods, performance bearing set, ARP studs and bolts throughout and properly set up rings for nitrous. Those are the things I can think of to change a normal rebuild into a fairly stout nitrous motor. Im not talking 400 shot or anything, prolly max 175.
.030 over 4.3
JE 4.030 Extreme duty pistons
5.7 Eagle H beam Rods(block needs clearancing for rods?)
266R Comp Cam
Stock oil pump/pickup
Stock DamperFlexplate/Timing Chain
ARP studs/bolts
Clevite Bearings
Ported stock Vortec heads w/3 angle valve job
Am I on the right track here? Do I have my thoughts of nitrous motor wrong?
#3
Hunt&Fisherator
iTrader: (15)
I'd mill the heads a bit and bump the compression a bit too, you'd be suprised how much different a. 100 shot feels at say 10:1 rather than 9:1... Just for an example.
Or of you don't want to mill, just get the proper piston for the CR you want.... I'd shoot for 10.3-10.5 for a street motor if you're not planning over a 200 hit.
Or of you don't want to mill, just get the proper piston for the CR you want.... I'd shoot for 10.3-10.5 for a street motor if you're not planning over a 200 hit.
#4
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The biggest difference for nitrous is always the forged pistons. You can get away with hypertechnic pistons on a hot street motor, but any built nitrous motor should have forged. Also on a SBC we ran about 20-25 thousandths on the gaps for nitrous, but I don't know if the new series changed this. Also total gap is determined by total nitrous HP to some extent. I always liked big gaps to help the rings live, but it will burn a bit of oil on the street.
Any quality fastener "stock or ARP" will work for under a 250 shot, but when you go above that you need to really look at ARP studs and a girdle or stronger main caps.
Try a staged nitrous system or use a timer to ramp up a healthy single shot. They are incredable.
Any quality fastener "stock or ARP" will work for under a 250 shot, but when you go above that you need to really look at ARP studs and a girdle or stronger main caps.
Try a staged nitrous system or use a timer to ramp up a healthy single shot. They are incredable.
#5
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I sprayed a 125 shot on a stock 4.3 and that same motor has 150k miles on it right now. Timing was never backed down or anything. I wouldn't go too crazy with forged stuff and what not because IMO you won't spray the 4.3 long before you say what the hell time for a motor swap. I would spray the house down on what you have and if it pops before you are ready to swap motors toss another one in. I use the same logic I used on my motorcycles, how much money are you willing to throw at a 600cc bike to beat a 1000. It can be done but why not start with the better platform?
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